Exercise 3 Page 304

When calculating the experimental probability, we are comparing the number of times the event occurs to the number of trials. P=Number of Times the Event Occurs/Number of Trials If we roll a number cube, we can roll six different outcomes. The sum of the frequencies of these outcomes is the total number of trials. Let's add them! 13+16+15+17+19+20= 100 Rolling at least a 3 means rolling either a 3, 4, 5, or 6. The sum of the frequencies of these outcomes is the number of times the event occured. 15+17+19+20= 71 Now we have enough information to calculate P(rolling at least a3 ).

P=Times the Event Occurs/Number of Trials

SubstituteValues

Substitute values

P(rolling at least a3)=71/100

CalcQuot

Calculate quotient

P(rolling at least a3)=0.71

WritePercent

Convert to percent

P(rolling at least a3)=71 %

The probability of spinning at least a 3 is 71100, which can also be written as 71 % .